package com.yunhai.svchall.service.impl;

import com.yunhai.platform.apistd.BizException;
import com.yunhai.platform.openapi.core.YschOpenCall;
import com.yunhai.platform.utils.exception.ErrorCode;
import com.yunhai.svchall.model.FcApplyModels.AppliedReport;
import com.yunhai.svchall.model.FcApplyModels.AppliedReportView;
import com.yunhai.svchall.model.FcApplyModels.ContextIssueRequest;
import com.yunhai.svchall.model.FcApplyModels.ContextIssueView;
import com.yunhai.svchall.model.FcApplyModels.ContextReceiptView;
import com.yunhai.svchall.model.FcApplyModels.GrantSnapshotView;
import com.yunhai.svchall.model.FcApplyModels.GrantVerifyRequest;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;

import java.util.Collections;
import java.util.List;

/**
 * 表单中心可信建件客户端（answer-delivery-v2 §6/§7，TASK_2 A.2/A.4/B.6）。
 *
 * <p>与 {@link FormCenterCatalogClient}（TASK_1 的目录/绑定核验）同一条出站范式：
 * 命名目标 {@code form-center} 经 {@link YschOpenCall} 走服务目录三级兜底，
 * 身份=本应用 appKey（starter 签名拦截器注入），<b>appKey/secret 绝不进浏览器</b>。
 * 本类只增加端点，不复用也不修改 TASK_1 那个客户端的职责范围。</p>
 *
 * <p>四条出站调用各有明确的失败语义，不搞"统一 catch 后返回 null"：</p>
 * <ul>
 *   <li>{@link #issueContext} 失败=意图不能进入填报，直接拒（没有可信上下文就没有可信建件）；</li>
 *   <li>{@link #fetchReceipt} 失败=确认动作不做，办件不形成（收据是唯一的答卷事实源）；</li>
 *   <li>{@link #reportApplied} 失败<b>不回滚</b>本地投影：中心没收到确认只是"对方还不知道"，
 *       台账里留 PENDING 由重报扫描追平；</li>
 *   <li>{@link #verifyGrants} 失败=消费端<b>暂缓写入</b>（撤权竞态口径），而不是按"还有效"放行。</li>
 * </ul>
 */
@Slf4j
@Component
public class FcSubmissionClient {

    /** 服务目录 key（同 TASK_1 客户端，一个目标不拆两个名字） */
    static final String TARGET = "form-center";
    static final String CONTEXT_PATH = "/oapi/form/submission-context";
    static final String DELIVERY_RECEIPT_PATH = "/oapi/form/answer-delivery/receipt";
    static final String GRANT_VERIFY_PATH = "/oapi/form/answer-delivery/grants/verify";

    private final YschOpenCall openCall;

    public FcSubmissionClient(YschOpenCall openCall) {
        this.openCall = openCall;
    }

    /** 签发/复用可信提交上下文（同意图重试回到同一上下文，不新建第二业务意图） */
    public ContextIssueView issueContext(ContextIssueRequest request) {
        requireRequest(request);
        try {
            ContextIssueView data = openCall.post(TARGET, CONTEXT_PATH, Collections.emptyMap(),
                    request, ContextIssueView.class);
            if (data == null || blank(data.getContextToken())) {
                throw new BizException(ErrorCode.PARAM_ERROR, "表单中心提交上下文返回异常（缺少 contextToken）");
            }
            if (!request.getIntentId().equals(data.getIntentId())) {
                throw new BizException(ErrorCode.PARAM_ERROR,
                        "表单中心返回的意图键与请求不符（请求 " + request.getIntentId()
                                + "，返回 " + data.getIntentId() + "）");
            }
            if (blank(data.getEmbedOrigin())) {
                // 中心锁定的可嵌入 origin 是 postMessage 的唯一目标；缺了就只能拒，不能自己拼一个
                throw new BizException(ErrorCode.PARAM_ERROR, "表单中心未返回可嵌入 origin，已拒绝打开填报页");
            }
            return data;
        } catch (BizException e) {
            throw e;
        } catch (RuntimeException e) {
            log.warn("[svc-hall] 提交上下文签发失败 intentId={}：{}", request.getIntentId(), e.toString());
            throw new BizException(ErrorCode.PARAM_ERROR,
                    "表单中心提交上下文不可达（网络/授权未配置）：" + e.getMessage());
        }
    }

    /** 读取服务端收据（确认动作的唯一数据源；浏览器 success 只是"可以去读"的信号） */
    public ContextReceiptView fetchReceipt(String fcIntentId) {
        if (blank(fcIntentId)) {
            throw new BizException(ErrorCode.PARAM_ERROR, "fcIntentId 必填");
        }
        try {
            ContextReceiptView data = openCall.get(TARGET, CONTEXT_PATH + "/" + fcIntentId + "/receipt",
                    Collections.emptyMap(), ContextReceiptView.class);
            if (data == null) {
                throw new BizException(ErrorCode.PARAM_ERROR, "表单中心收据返回空 data");
            }
            return data;
        } catch (BizException e) {
            throw e;
        } catch (RuntimeException e) {
            log.warn("[svc-hall] 收据读取失败 intentId={}：{}", fcIntentId, e.toString());
            throw new BizException(ErrorCode.PARAM_ERROR,
                    "表单中心收据不可达（网络/授权未配置），本次不建件：" + e.getMessage());
        }
    }

    /** 上报本地应用结果（consumerApplied）；失败只记台账，不回滚已落库的投影 */
    public AppliedReportView reportApplied(AppliedReport report) {
        try {
            return openCall.post(TARGET, DELIVERY_RECEIPT_PATH, Collections.emptyMap(),
                    report, AppliedReportView.class);
        } catch (RuntimeException e) {
            log.warn("[svc-hall] 投递回执上报失败 eventId={}：{}", report == null ? null : report.getEventId(),
                    e.toString());
            return null;
        }
    }

    /** 批量授权核验（消费端写投影前的闸门；不可用即暂缓，不按"还有效"放行） */
    public List<GrantSnapshotView> verifyGrants(Long consumerSchoolId, List<String> formUuids) {
        GrantVerifyRequest body = new GrantVerifyRequest();
        body.setConsumerSchoolId(consumerSchoolId);
        body.setFormUuids(formUuids == null ? Collections.emptyList() : formUuids);
        try {
            GrantSnapshotView[] data = openCall.post(TARGET, GRANT_VERIFY_PATH, Collections.emptyMap(),
                    body, GrantSnapshotView[].class);
            if (data == null) {
                throw new IllegalStateException("grants/verify 返回空 data");
            }
            return java.util.Arrays.asList(data);
        } catch (RuntimeException e) {
            log.warn("[svc-hall] 授权核验失败 school={}：{}", consumerSchoolId, e.toString());
            throw new BizException(ErrorCode.PARAM_ERROR, "表单中心授权核验不可达，本次暂缓写入");
        }
    }

    private static void requireRequest(ContextIssueRequest request) {
        if (request == null || blank(request.getIntentId())) {
            throw new BizException(ErrorCode.PARAM_ERROR, "intentId 必填（本应用服务端生成的业务意图键）");
        }
        if (request.getConsumerSchoolId() == null || request.getConsumerSchoolId() <= 0) {
            throw new BizException(ErrorCode.PARAM_ERROR, "consumerSchoolId 必须是真实学校");
        }
        if (blank(request.getFormUuid()) || request.getFormVersion() == null || request.getFormVersion() <= 0) {
            throw new BizException(ErrorCode.PARAM_ERROR, "表单坐标必须成对且版本确切");
        }
        if (request.getSubmitterId() == null || request.getSubmitterId() <= 0) {
            throw new BizException(ErrorCode.PARAM_ERROR, "submitterId 必填（会话用户，不接受浏览器传入）");
        }
    }

    private static boolean blank(String raw) {
        return raw == null || raw.trim().isEmpty();
    }
}